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    CLIPPING IN REFERENCE PICTURE RESAMPLING
    222.
    发明申请
    CLIPPING IN REFERENCE PICTURE RESAMPLING 有权

    公开(公告)号：US20220132104A1

    公开(公告)日：2022-04-28

    申请号：US17568599

    申请日：2022-01-04

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Zhipin DENG ,  Jizheng XU ,  Yue WANG

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

    Abstract: A method of video processing includes making a first determination about whether a decoder-side motion vector refinement (DMVR) tool is enabled for a conversion between a current block of a current picture of a video and a coded representation of the video; making a second determination, based on the first determination, about whether or how to clip a motion vector according to a bounding block for reference sample padding in a reference picture used for determining a prediction block for the current block according to a rule, and performing the conversion based on the first determination and the second determination. By using the DMVR tool, an encoded motion vector from the coded representation is refined prior to using for determining the prediction block.

    CODING MODE BASED ON A CODING TREE STRUCTURE TYPE
    225.
    发明申请
    CODING MODE BASED ON A CODING TREE STRUCTURE TYPE 有权

    公开(公告)号：US20220038717A1

    公开(公告)日：2022-02-03

    申请号：US17502202

    申请日：2021-10-15

    Applicant: Bytedance Inc.

    Inventor： Weijia ZHU ,  Li ZHANG ,  Jizheng XU

    IPC: H04N19/176 ,  H04N19/11 ,  H04N19/70 ,  H04N19/157

    Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes making a decision, for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, regarding an application of an intra block copy (IBC) mode based on or inferred from at least a coding tree structure associated with the current video block; and selectively including, in the bitstream representation, a syntax element indicative of the application of the IBC mode based on or inferred from at least the coding tree structure.

    RESTRICTED UPSAMPLING PROCESS IN MATRIX-BASED INTRA PREDICTION
    226.
    发明申请
    RESTRICTED UPSAMPLING PROCESS IN MATRIX-BASED INTRA PREDICTION 有权

    公开(公告)号：US20220014752A1

    公开(公告)日：2022-01-13

    申请号：US17480208

    申请日：2021-09-21

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  G06F17/16

    Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a conversion between a current video block of a video and a bitstream representation of the current video block using a matrix based intra prediction (MIP) mode, where the conversion includes performing the upsampling operation in which the final prediction block is determined by using a reduced prediction block of the current video block and by using reconstructed neighboring samples of the current video block according to a rule, and where the reduced prediction block is obtained by performing the matrix vector multiplication operation on reduced boundary samples of the current video block.

    MATRIX DERIVATION IN INTRA CODING MODE
    229.
    发明申请
    MATRIX DERIVATION IN INTRA CODING MODE 有权

    公开(公告)号：US20210385438A1

    公开(公告)日：2021-12-09

    申请号：US17399879

    申请日：2021-08-11

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Zhipin DENG ,  Kai ZHANG ,  Li ZHANG ,  Hongbin LIU ,  Jizheng XU

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/70 ,  H04N19/176

    Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes performing a conversion between a current video block of a video and a bitstream representation of the current video block according to a rule, where the rule specifies a relationship between samples of the current video block and matrices or offset values applied in a matrix weighted intra prediction (MIP) mode during the conversion, and where the MIP mode includes determining a prediction block of the current video block by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation.

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